﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using Microsoft.Office.Interop;
using System.IO;
using System.Reflection;
namespace XBoshiGFS
{
    class ExportToExcelHelper
    {


     #region DataGridView数据显示到Excel   
 /// <summary>    
 /// 打开Excel并将DataGridView控件中数据导出到Excel   
 /// </summary>    
 /// <param name="dgv">DataGridView对象 </param>    
 /// <param name="isShowExcle">是否显示Excel界面 </param>    
 /// <remarks>   
 /// add com "Microsoft Excel 11.0 Object Library"   
 /// using Excel=Microsoft.Office.Interop.Excel;   
 /// </remarks>   
 /// <returns> </returns>    
 public static bool DataGridviewShowToExcel(DataGridView dgv, bool isShowExcle)   
 {   
     if (dgv.Rows.Count == 0)   
         return false;   
     //建立Excel对象    
     Microsoft.Office.Interop.Excel.Application excel = new Microsoft.Office.Interop.Excel.Application();   
     excel.Application.Workbooks.Add(true);   
     excel.Visible = isShowExcle;   
     //生成字段名称    
     for (int i = 0; i < dgv.ColumnCount; i++)   
     {   
         excel.Cells[1, i + 1] = dgv.Columns[i].HeaderText;   
     }   
     //填充数据    
     for (int i = 0; i < dgv.RowCount - 1; i++)   
     {   
         for (int j = 0; j < dgv.ColumnCount; j++)   
         {   
             if (dgv[j, i].ValueType == typeof(string))   
             {   
                 excel.Cells[i + 2, j + 1] = "'" + dgv[j, i].Value.ToString();   
             }   
             else  
             {   
                 excel.Cells[i + 2, j + 1] = dgv[j, i].Value.ToString();   
             }   
         }   
     }   
     return true;   
 }  
 #endregion   
  
 #region DateGridView导出到csv格式的Excel   
 /// <summary>   
 /// 常用方法，列之间加\t，一行一行输出，此文件其实是csv文件，不过默认可以当成Excel打开。   
 /// </summary>   
 /// <remarks>   
 /// using System.IO;   
 /// </remarks>   
 /// <param name="dgv"></param>   
 public void DataGridViewToCSV(DataGridView dgv)   
 {   
     SaveFileDialog dlg = new SaveFileDialog();   
     dlg.Filter = "Execl files (*.xls)|*.xls";   
     dlg.FilterIndex = 0;   
     dlg.RestoreDirectory = true;   
     dlg.CreatePrompt = true;   
     dlg.Title = "保存为Excel文件";   
   
     if (dlg.ShowDialog() == DialogResult.OK)   
     {   
         Stream myStream;   
         myStream = dlg.OpenFile();   
         StreamWriter sw = new StreamWriter(myStream, System.Text.Encoding.GetEncoding(-0));   
         string columnTitle = "";   
         try  
         {   
             //写入列标题   
             for (int i = 0; i < dgv.ColumnCount; i++)   
             {   
                 if (i > 0)   
                 {   
                     columnTitle += "\t";   
                 }   
                 columnTitle += dgv.Columns[i].HeaderText;   
             }   
             sw.WriteLine(columnTitle);   
   
             //写入列内容   
             for (int j = 0; j < dgv.Rows.Count; j++)   
             {   
                 string columnValue = "";   
                 for (int k = 0; k < dgv.Columns.Count; k++)   
                 {   
                     if (k > 0)   
                     {   
                         columnValue += "\t";   
                     }   
                     if (dgv.Rows[j].Cells[k].Value == null)   
                         columnValue += "";   
                     else  
                         columnValue += dgv.Rows[j].Cells[k].Value.ToString().Trim();   
                 }   
                 sw.WriteLine(columnValue);   
             }   
             sw.Close();   
             myStream.Close();   
         }   
         catch (Exception e)   
         {   
             MessageBox.Show(e.ToString());   
         }   
         finally  
         {   
             sw.Close();   
             myStream.Close();   
         }   
     }   
 }   
 #endregion  
  
 #region DataGridView导出到Excel，有一定的判断性   
 /// <summary>    
 ///方法，导出DataGridView中的数据到Excel文件    
 /// </summary>    
 /// <remarks>   
 /// add com "Microsoft Excel 11.0 Object Library"   
 /// using Excel=Microsoft.Office.Interop.Excel;   
 /// using System.Reflection;   
 /// </remarks>   
 /// <param name= "dgv"> DataGridView </param>    
 public static void DataGridViewToExcel(DataGridView dgv)   
 {  
  
  
     #region   验证可操作性   
   
     //申明保存对话框    
     SaveFileDialog dlg = new SaveFileDialog();   
     //默然文件后缀    
     dlg.DefaultExt = "xls ";   
     //文件后缀列表    
     dlg.Filter = "EXCEL文件(*.XLS)|*.xls ";   
     //默然路径是系统当前路径    
     dlg.InitialDirectory = Directory.GetCurrentDirectory();   
     //打开保存对话框    
     if (dlg.ShowDialog() == DialogResult.Cancel) return;   
     //返回文件路径    
     string fileNameString = dlg.FileName;   
     //验证strFileName是否为空或值无效    
     if (fileNameString.Trim() == " ")   
     { return; }   
     //定义表格内数据的行数和列数    
     int rowscount = dgv.Rows.Count;   
     int colscount = dgv.Columns.Count;   
     //行数必须大于0    
     if (rowscount <= 0)   
     {   
         MessageBox.Show("没有数据可供保存 ", "提示 ", MessageBoxButtons.OK, MessageBoxIcon.Information);   
         return;   
     }   
   
     //列数必须大于0    
     if (colscount <= 0)   
     {   
         MessageBox.Show("没有数据可供保存 ", "提示 ", MessageBoxButtons.OK, MessageBoxIcon.Information);   
         return;   
     }   
   
     //行数不可以大于65536    
     if (rowscount > 65536)   
     {   
         MessageBox.Show("数据记录数太多(最多不能超过65536条)，不能保存 ", "提示 ", MessageBoxButtons.OK, MessageBoxIcon.Information);   
         return;   
     }   
   
     //列数不可以大于255    
     if (colscount > 255)   
     {   
         MessageBox.Show("数据记录行数太多，不能保存 ", "提示 ", MessageBoxButtons.OK, MessageBoxIcon.Information);   
         return;   
     }   
   
     //验证以fileNameString命名的文件是否存在，如果存在删除它    
     FileInfo file = new FileInfo(fileNameString);   
     if (file.Exists)   
     {   
         try  
         {   
             file.Delete();   
         }   
         catch (Exception error)   
         {   
             MessageBox.Show(error.Message, "删除失败 ", MessageBoxButtons.OK, MessageBoxIcon.Warning);   
             return;   
         }   
     }  
     #endregion   
     Microsoft.Office.Interop.Excel.Application objExcel = null;   
     Microsoft.Office.Interop.Excel.Workbook objWorkbook = null;   
     Microsoft.Office.Interop.Excel.Worksheet objsheet = null;   
     try  
     {   
         //申明对象    
         objExcel = new Microsoft.Office.Interop.Excel.Application();   
         objWorkbook = objExcel.Workbooks.Add(Missing.Value);   
         objsheet = (Microsoft.Office.Interop.Excel.Worksheet)objWorkbook.ActiveSheet;   
         //设置EXCEL不可见    
         objExcel.Visible = false;   
   
         //向Excel中写入表格的表头    
         int displayColumnsCount = 1;   
         for (int i = 0; i <= dgv.ColumnCount - 1; i++)   
         {   
             if (dgv.Columns[i].Visible == true)   
             {   
                 objExcel.Cells[1, displayColumnsCount] = dgv.Columns[i].HeaderText.Trim();   
                 displayColumnsCount++;   
             }   
         }   
         //设置进度条    
         //tempProgressBar.Refresh();    
         //tempProgressBar.Visible   =   true;    
         //tempProgressBar.Minimum=1;    
         //tempProgressBar.Maximum=dgv.RowCount;    
         //tempProgressBar.Step=1;    
         //向Excel中逐行逐列写入表格中的数据    
         for (int row = 0; row <= dgv.RowCount - 1; row++)   
         {   
             //tempProgressBar.PerformStep();    
   
             displayColumnsCount = 1;   
             for (int col = 0; col < colscount; col++)   
             {   
                 if (dgv.Columns[col].Visible == true)   
                 {   
                     try  
                     {   
                         objExcel.Cells[row + 2, displayColumnsCount] = dgv.Rows[row].Cells[col].Value.ToString().Trim();   
                         displayColumnsCount++;   
                     }   
                     catch (Exception)   
                     {   
   
                     }   
   
                 }   
             }   
         }   
         //隐藏进度条    
         //tempProgressBar.Visible   =   false;    
         //保存文件    
         objWorkbook.SaveAs(fileNameString, Missing.Value, Missing.Value, Missing.Value, Missing.Value,   
                 Missing.Value, Microsoft.Office.Interop.Excel.XlSaveAsAccessMode.xlShared, Missing.Value, Missing.Value, Missing.Value,   
                 Missing.Value, Missing.Value);   
     }   
     catch (Exception error)   
     {   
         MessageBox.Show(error.Message, "警告 ", MessageBoxButtons.OK, MessageBoxIcon.Warning);   
         return;   
     }   
     finally  
     {   
         //关闭Excel应用    
         if (objWorkbook != null) objWorkbook.Close(Missing.Value, Missing.Value, Missing.Value);   
         if (objExcel.Workbooks != null) objExcel.Workbooks.Close();   
         if (objExcel != null) objExcel.Quit();   
   
         objsheet = null;   
         objWorkbook = null;   
         objExcel = null;   
     }   
     MessageBox.Show(fileNameString + "\n\n导出完毕! ", "提示 ", MessageBoxButtons.OK, MessageBoxIcon.Information);   
   
 }  
  
 #endregion  

    }
}
